Chain guide



July 12, 1927. 1,635,552

6. P. LA SHELLE ET AL CHAIN GUIDE Filed Sept. 2. 1321 Patented July 12,1927.

PATENT"OFFICE?-- CLAUDEP. LA SHELLE AND WA T R ansrmn vs, or NEW Yo H..Y

CHAIN GUIDE.

Application fi'led September 2, 1921. Seria1'No .'498,10 5.

Our invention'relatesto pull socket-jand particularly to means forguiding the pull chain.

It is an object of the invention to provide novel means for accuratelypositioning the chain guide with relation to the parts opparts.

erated thereby.

'It is a'further object to provide a chain' guide held between theswitch carrying block and the'socket shell and which will'be preventedfrom longitudinal movement relative to the block by means independent ofthe enclosing shell. p I

In the preferred form of our invention there is provided a socket shellenclosing switch mechanism to be operated by a pull chain. A chain guideis positioned between the enclosing shell and the switchcarrying blockwithin the. shell and the switch carrying block'and chain guide haveco-operating means for accurately positioning the chain guide relativelyto the switch operating In the drawings we have shown a preferred formof our invention. 1

Fig. l is a view in elevation of a lamp socket embodying features of ourinvention.

r Fig. 2 is a similar view of the interior of a lamp socket showing ourimproved chain guide positioned relatively to the switch block. I

I Fig. 3 is a partial vertical sectional viewof' the shell body andinterior parts.

' Fig. 4 is an enlarged detail perspective View of one form of ourimproved chain guide. Y

The pullsocket body is provided with a slot 7 through which projectspart of the chain guide 8. The

as a chain 9'eXte-nding through the'chain' 7 guide.

The interior of the socket may comprise a switch carrying block which isusually made in two parts 10 -11 suitably secured together and holdingthe switch operating "mechanism therebetween. The switch opcratingmechanisms for pull sockets are well known inthe art and therefore nodetailed V disclosure thereof has been made in the present application',The pull chain 9is secured to the oscillating member 12 and'serves toincludes the usual shell body 5 and cap 6 suitably'held thereon. The

the circuit as will be understood by those skilled in-the art.

The chain guide 8 preferably. comprises a base plate or portion 13 anda' bell 14.' The. bell and base plate are usuallyiseparately formed andafterwardssecured together-in any suitable manner.

In the form shown,.

the switch carrying blockis 'provi'ded withg a boss or lug 15 at oneside. The base plate of the chain guide has one ormore fingers 1617 anda suitable edge or surface 18 therebetween. The fingers 16 -17 looselyfit the sides of the lug .15 and prevent relative sidewise movementbetween. the chain guide and switch block. Theedge or surface. 18 mayengage a part of the block, pref- I erably the underside of the lugthereohQfor preventing upward movement of'the' chain guide relatively tothe switch block. We also provide means for preventing downwardlongitudinal movement of the chain guide.

In the form shown, extending from one or both of the fingers is apart orprojection 19 which may engage the-upper 'end of the lug for preventingdownward longitudinal movement of the chain guide. The parts 'justdescribed may be .conveniently formed by providing an aperture 20 in thebase Y This'aperture 20 and the lug 15 plate. preferably correspond inshape though the aperture is of such commodated by the lug.

size" as to be readily ac When the parts are bled the chain guideis setin place with the aperture receiving the lug. The parts are then slidinto the body of theshell with the base plate preferably extendingbetween-theswitch carrylng block and the bodyof the shell. The

slot 7 in the shell is open atthe top to permit the insertion of theprojecting chain bell and lug. The-cap is then applied to the shell bodyand the assembly is complete.

The lug acts as a' positioning means for the chainguide and the latteris dependentupon, and co acts with, the shell whereby the latterholds'the'chain guide in place. 7

It is. obvious that if for any reason there is a tendency ofthe swit chblockto bemoved longitudinally within] the shell, the chain guide willrestrain the block and therefore I the chain will, always be. guided"and in proper fposition" v to operate the interior I switch parts.

, switch.

operating pull switches,. obviously other 7 It will be noted that thechain guide is not attached to either of the members but 'is heldbetween the interior block. and the shelhbut when the parts areassembled, the guide is accurately positioned with relation totheinterior switch. 7

The term chai' has been used" herein to definef any element foroperating the l/Vhile chains are usually used for members may be used. a

vYvhile:wehawe: descrlbed in great deta l one form: of our; naventiomxve do not wish 'to be limited to the form-shown; for ob.-

viously, many changes may be made under the following claiml'l r Weclaim: A pull socketprojecting outwardly therefrom near its upcomprisingan, insulating body having a: lug integral therewith and of the body andshell and a cap covering the outer end odi saitlh ig said lug and baseplate being so interlocked as to prevent the chain guide from shiftingon said body in any direction except in; a direction: at right angles tosaid body when said'shell is removed, said cl-1ainguide being readilyremovable ina direction at right angles to the surface of: the body atsaid lug when the shell is removed. r

e 1 CLAUDE PPLA SHELLE.

WALTER A, BEHRENS.

